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Phylum Cnidaria

Total questions: 12

Worksheet time: 6mins

Name
Class
Date
1.

What is the highest level of organization in Cnidarians?

a)

cell

b)

organ

c)

tissue

d)

organ system

2.

This is an example of which Class of Cnidarians?

a)

Class Cubozoa

b)

Class Scyphozoa

c)

Class Anthozoa

d)

Class Hydrozoa

3.

The two body forms of Cnidarians

a)

polyp and bell

b)

bud and medusa

c)

bud and bell

d)

polyp and medusa

4.

The inner tissue layer depicted in blue in the image.

a)

gastrodermis

b)

mesoglea

c)

epidermis

d)

extrodermis

5.

The central body cavity used for digestion, respiration, excretion, and reproduction

a)

cnidocyte

b)

mesoglea

c)

spongocoel

d)

coelenteron

6.

Cnidarians have a _ digestive system?

a)

circular

b)

complete

c)

incomplete

d)

tract

7.

This layer acts as a hydrostatic skeleton

a)

mesoglea

b)

epidermis

c)

gastrodermis

d)

endodermis

8.

A long thread-like projection that pierces prey and injects venom

a)

cnidocyte

b)

nematocyst

c)

spicule

d)

mesoglea

9.

The sessile stage of Cnidaria life history

a)

medusa

b)

bell

c)

stalk

d)

polyp

10.

What is the name of the larval stage of Moon Jellyfish after the egg has been fertilized?

a)

planula

b)

strobila

c)

polyp

d)

ephyra

11.

This is an example of which Class of Cnidaria?

a)

Cubozoa

b)

Anthozoa

c)

Scyphozoa

d)

Hydrozoa

12.

Cells found in the tentacles used for attachment, defense, and feeding

a)

cnidocyte

b)

choanocyte

c)

nematocyst

d)

amoebocyte